Define Dynamics.
The study of forces and their effect on motion.
What is Weight (Force of Gravity)?
The force pulling an object down due to gravity; calculated as $W = mg$.
Define Normal Force.
The force exerted by a surface on an object, perpendicular to the surface.
What is Tension?
The pulling force exerted by a string or rope.
Define Friction.
A force that opposes motion between surfaces.
What is a system?
The collection of objects being studied.
Define Gravitational Field.
The region around a massive object where other massive objects experience gravitational force.
What is Inertia?
The tendency of an object to resist changes in its state of motion.
Define Net Force.
The vector sum of all forces acting on an object.
What is the difference between static and kinetic friction?
Static Friction: Opposes the start of motion. | Kinetic Friction: Opposes motion when the object is already moving.
Compare Closed and Open Systems.
Closed Systems: No exchange of matter or energy with surroundings. | Open Systems: Exchange of matter and/or energy with surroundings.
Compare Conservative and Non-conservative Systems.
Conservative Systems: Total mechanical energy is conserved. | Non-conservative Systems: Total mechanical energy is not conserved (energy can be lost).
Define Dynamics.
The study of forces and their effect on motion, explaining *why* objects move as they do.
What is Weight (Force of Gravity)?
The force pulling an object down due to gravity, calculated as $W = mg$, where g is the acceleration due to gravity.
Define Normal Force.
The force exerted by a surface on an object, always perpendicular to the surface.
What is Tension?
The pulling force exerted by a string, rope, cable, or similar object on another object.
Define Friction.
A force that opposes motion between surfaces in contact.
What is a System in Physics?
A defined collection of objects being studied, crucial for determining internal and external forces.
Define Gravitational Field.
The region around a massive object where other massive objects experience a gravitational force.
What is Inertia?
The tendency of an object to resist changes in its state of motion.
